- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 17/04 - Couplings; Joints between rod and bit, or between rod and rod
Patent holdings for IPC class E21B 17/04
Total number of patents in this class: 578
10-year publication summary
60
|
86
|
50
|
54
|
47
|
35
|
64
|
49
|
37
|
9
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Halliburton Energy Services, Inc. | 20165 |
96 |
Schlumberger Technology Corporation | 9690 |
25 |
Evolution Engineering Inc. | 313 |
18 |
Schlumberger Canada Limited | 6913 |
17 |
National Oilwell Varco, L.P. | 1604 |
17 |
Schlumberger Technology B.v. | 4951 |
16 |
Services Petroliers Schlumberger | 5426 |
16 |
Baker Hughes, a GE Company, LLC | 2171 |
13 |
Baker Hughes Incorporated | 5689 |
11 |
Weatherford Technology Holdings, LLC | 2135 |
11 |
Vallourec Oil and Gas France | 450 |
8 |
Pier Tech Systems, LLC | 20 |
7 |
Sandvik Mining and Construction Tools AB | 147 |
7 |
Sandvik Intellectual Property AB | 1634 |
6 |
The Charles Machine Works, Inc. | 411 |
5 |
Odfjell Well Services Norway AS | 18 |
5 |
Reflex Instruments Asia Pacific Pty Ltd | 83 |
5 |
Tracto-Technik GmbH & Co. KG | 166 |
5 |
Baker Hughes Oilfield Operations, LLC | 1885 |
5 |
KHOLLE Magnolia 2015, LLC | 19 |
5 |
Other owners | 280 |